20315017377 has 8 divisors (see below), whose sum is σ = 30096322080. Its totient is φ = 13543344900.

The previous prime is 20315017367. The next prime is 20315017381. The reversal of 20315017377 is 77371051302.

It is not a de Polignac number, because 20315017377 - 2⁷ = 20315017249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20315017367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376203999 + ... + 376204052.

It is an arithmetic number, because the mean of its divisors is an integer number (3762040260).

Almost surely, 2^20315017377 is an apocalyptic number.

20315017377 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20315017377 is a deficient number, since it is larger than the sum of its proper divisors (9781304703).

20315017377 is an equidigital number, since it uses as much as digits as its factorization.

20315017377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752408060 (or 752408054 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 36.

Adding to 20315017377 its reverse (77371051302), we get a palindrome (97686068679).

The spelling of 20315017377 in words is "twenty billion, three hundred fifteen million, seventeen thousand, three hundred seventy-seven".